Battery Temperature Sensor Mounting With Foam Pressure Contact
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Solution Overview
Problem
Conventional temperature measuring devices for batteries, such as those in electric vehicles, face reliability issues due to adhesive material deterioration and require complex mechanisms with multiple parts, increasing assembly time and cost.
Innovation Solution
A temperature measuring device comprising a flexible printed circuit board, a thermistor element, a heat collecting plate, and a foam-based pressing member that compresses the heat collecting plate against the object to be measured, reducing the number of parts and ensuring stable contact regardless of dimensional tolerances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If adhesive tape is used to attach the thermistor element mounting portion, then the attachment method is simple, but the reliability deteriorates due to peeling from adhesive material deterioration
Solution Approach 1:
The patent replaces the chemical bonding method (adhesive tape) with a mechanical pressing mechanism. A pressing member applies continuous mechanical force to maintain contact between the thermistor element mounting portion and the battery cell, eliminating the reliability issues associated with adhesive deterioration while maintaining simple attachment procedures.
2Reliability
If a spring mechanism is used to press the thermistor element mounting portion against the cell, then the temperature measurement stability is improved, but the number of parts increases
Solution Approach 1:
The patent employs a flexible pressing member made of elastomeric material that can deform to accommodate dimensional tolerances of various components. This flexible pressing mechanism maintains reliable contact pressure without requiring complex spring assemblies, reducing the number of parts while ensuring stable temperature measurement.
3Reliability
If a spring mechanism is used to ensure reliable contact, then the contact reliability is improved, but the assembly time and installation space increase
Solution Approach 1:
The patent extracts the essential function of the spring mechanism (providing pressing force) and implements it through a simpler elastomeric pressing member. This simplified component maintains contact reliability while reducing assembly complexity and time, as it requires fewer installation steps and occupies less space within the battery structure.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution allows for stable temperature measurement with a reduced number of parts, lower assembly costs, and simplified installation, while the foam pressing member ensures reliable contact without the need for additional adhesives or complex mechanisms.
Implementation Method 1
the pressing member is made of a foam material and is configured to be compressed when the case is fixed to the object to be measured and to press the heat collecting plate against the object to be measured
Implementation Method 2
a thermistor element; the thermistor element is electrically connected to the wiring
Implementation Method 3
the heat collecting plate is disposed on a side opposite to the thermistor element via the flexible printed circuit board so as to be pressed against a temperature measuring point in the object to be measured
Data Source
AI summary
Provided is a temperature measuring device which includes: a flexible printed circuit board with wiring; a thermistor element; a heat collecting plate; and a pressing member. The flexible printed circuit board is configured to be attached to a case that is fixed to an object to be measured, the thermistor element is electrically connected to the wiring, the heat collecting plate is disposed on a side opposite to the thermistor element via the flexible printed circuit board so as to be pressed against a temperature measuring point in the object to be measured, and the pressing member is made of a foam material and is configured to be compressed when the case is fixed to the object to be measured and to press the heat collecting plate against the object to be measured.